With 40 horses to choose from, picking a winner on Grand National day is anything but easy. To make it easier we'll be providing you with the betting for the 40. The Last Samuri heads the final field of 40 runners in Saturday's Randox Health Grand National at Aintree. Sportsmail's Sam Turner analyses. The official field of runners for the Grand National is finalised in the week before the race (8th April ). Until then we'll feature the leading horses in the. New contract, new hair, new stadium - a new Griezmann Atletico striker returns to training with a new look after turning down Manchester United. Also fourth on Philson Run in and sixth on Ucello Conti last year. Currently Vieux Lion Rouge is the favourite to win the Randox Health Grand National handicap, overtaking Definitely Red. Part-owner Sir Martin Broughton recalls the Grand National, 2 premier league Devon Loch collapsed 50 yards from the winning post, as being one of his earliest Grand National memories: BBC Sport's Frank Keogh's verdict: Seems to need decent ground and probably found the going too soft when pulled up last year. H ighland Lodge, Another Shuffle, Good To Know, Pleasant Company are all going okay.